On Wednesday, 14 Mar 2018 at 11:39, Dereje Tefera wrote:
> Dear John and R Jain,
>
> I have done all required installation for the Latex and it worked for a
> couple of times but it  then crashes. This is the error message I am
> getting while trying to export to Latex PDF or Beamer. I really appreciate
> your cooperation but I completely if you are busy.

So, it looks like LaTeX is now being found but that there are errors in
the LaTeX created by org.  Have you looked at the LaTeX output buffer,
as the error message suggests?

> Debugger entered--Lisp error: (error "File
> \"c:/Users/deret/Desktop/examp3.pdf\" wasn’t produced.  See \"*Org PDF LaTeX Output*\" for details")

The error will likely be near the end of the buffer.

-- 
Eric S Fraga via Emacs 27.0.50, Org release_9.1.6-303-g6cf5fc.dirty